/* 计算器页面特定样式 */
    .calculator-section {
      padding: 32px 0 48px;
      background: #f8f9fa;
    }

    .calculator-grid {
      max-width: 900px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .calc-card {
      background: white;
      border-radius: 10px;
      padding: 2rem;
      margin-bottom: 2rem;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    }

    .calc-card h3 {
      color: #3498db;
      font-size: 1.5rem;
      margin-bottom: 1.5rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .calc-card h3::before {
      content: '';
      width: 4px;
      height: 24px;
      background: #3498db;
      border-radius: 2px;
    }

    .input-group {
      margin-bottom: 1.5rem;
    }

    .input-row {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 20px;
      margin-bottom: 24px;
    }

    .input-field {
      min-width: 0;
    }

    label {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: 500;
      color: #2c3e50;
    }

    input[type="date"],
    input[type="time"],
    input[type="number"],
    input[type="datetime-local"] {
      width: 100%;
      min-width: 0;
      min-height: 48px;
      box-sizing: border-box;
      padding: 12px;
      border: 1px solid #ddd;
      border-radius: 5px;
      font-family: 'Noto Sans SC', sans-serif;
      font-size: 1rem;
      transition: border-color 0.3s ease;
    }

    input[type="date"]:focus,
    input[type="time"]:focus,
    input[type="number"]:focus,
    input[type="datetime-local"]:focus {
      outline: none;
      border-color: #3498db;
    }

    .btn-calculate {
      background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
      color: white;
      border: none;
      padding: 14px 30px;
      border-radius: 8px;
      font-size: 1rem;
      font-weight: 500;
      cursor: pointer;
      width: auto;
      min-height: 48px;
      font-family: inherit;
      transition: background 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-calculate:hover {
      box-shadow: 0 8px 24px rgba(52, 152, 219, 0.4);
    }

    .result {
      margin-top: 1.5rem;
      padding: 1.5rem;
      background: rgba(52, 152, 219, 0.1);
      border-radius: 8px;
      border-left: 4px solid #3498db;
      display: none;
    }

    .result.show {
      display: block;
      animation: fadeIn 0.3s ease;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(-10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .result-title {
      font-size: 0.85rem;
      color: #7f8c8d;
      margin-bottom: 0.5rem;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .result-value {
      font-size: 1.5rem;
      color: #27ae60;
      font-weight: 600;
      word-break: break-word;
    }

    .result-detail {
      margin-top: 1rem;
      padding-top: 1rem;
      border-top: 1px solid rgba(0, 0, 0, 0.1);
      font-size: 0.95rem;
      color: #2c3e50;
    }

    .result-detail span {
      color: #3498db;
      font-weight: 600;
    }

    .back-link {
      text-align: center;
      padding: 40px 0;
      background: white;
    }

    .back-link a {
      color: #3498db;
      text-decoration: none;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .back-link a:hover {
      color: #2980b9;
    }

    @media (max-width: 768px) {
      .calculator-section { padding: 24px 0; }

      .calculator-grid { padding: 0 16px; }

      .calc-card {
        padding: 20px;
      }

      .input-row {
        grid-template-columns: minmax(0, 1fr);
        gap: 16px;
      }

      .btn-calculate { width: 100%; }

      .calc-card h3 { font-size: 1.25rem; }
    }